How to Read and Write a Corrugated Box Specification Sheet

How to Read and Write a Corrugated Box Specification Sheet

Most packaging disputes trace back to the same root cause: the buyer and supplier never wrote down exactly what was agreed. A proper specification sheet fixes that by turning a verbal understanding into a document both sides can check every order against. Here's how to read one, what each field actually means, and a simple template you can adapt.

Why a Specification Sheet Matters More Than a Verbal Brief

A phone call or WhatsApp message describing "a strong box, about this big" feels efficient in the moment, but it leaves too much open to interpretation — and interpretation gaps are exactly where quality disputes, dimension mismatches and repeat-order inconsistencies come from. A written specification sheet does two things a verbal brief can't: it gives your supplier a precise, unambiguous target to manufacture against, and it gives you a fixed reference to inspect deliveries against later, rather than relying on memory of what was discussed weeks earlier.

This matters even more for repeat orders. Without a written spec, small drifts can creep in over successive production runs — a slightly different board grade, a marginally different flute — without anyone deciding to change anything on purpose.

Core Fields: Dimensions, Board and Flute

These fields form the structural backbone of any specification sheet:

• Internal dimensions (L x W x H): The usable space inside the erected box where your product sits. This is what your product actually needs to fit.
• External dimensions: The outer footprint of the erected box, relevant for palletising, freight calculation and warehouse storage planning.
• Board grade/construction: Whether the box is single wall, double wall, or triple wall, and the paper grade (GSM) of each liner and the fluting medium.
• Flute type: Common flute profiles like B, C or E flute each offer a different balance of cushioning, wall thickness, stacking strength and print quality. Specifying flute type gives your supplier far more precision than just stating a paper weight.
• Box style: The construction style — for example a regular slotted container versus a die-cut style — since this affects both strength and assembly.

It also helps to note which fields are fixed and which have some flexibility. For example, you might be firm on internal dimensions but flexible on exact board GSM as long as a minimum strength expectation is met — spelling this out prevents your supplier from either over-engineering the box unnecessarily or assuming more flexibility than you actually intended.

Print, Tolerances and Quantity Terms

Beyond the structural basics, these fields prevent ambiguity on the details that cause the most back-and-forth:

• Print specification: Number of colours, print process, panel placement for each graphic element, and any barcodes or QR codes with required size and scan-readability. Reference an approved proof file wherever possible.
• Tolerances: No manufacturing process holds a dimension to exactly zero variation. State an acceptable tolerance range for dimensions and board weight so that normal production variation isn't mistaken for a quality defect on either side.
• Quantity and unit of order: Total quantity, minimum order quantity if applicable, and whether quantities are counted per piece, per bundle or per pallet.
• Packing and delivery terms: How the boxes themselves are bundled, palletised and delivered, since this affects how you receive and store them.

One field that's easy to forget but genuinely useful is a revision date and version number on the specification sheet itself. If a design changes over time — a dimension tweak, a new print element — having a version history prevents confusion about which specification is actually current, especially when multiple people on your team or your supplier's team are involved in approvals.

A Simple Specification Template You Can Reuse

A workable specification sheet doesn't need to be complicated. At minimum, it should capture:

• Product name/SKU the box is for, and date of specification
• Internal dimensions (L x W x H) with tolerance
• External dimensions with tolerance
• Board construction: number of walls, liner GSM, flute medium GSM, flute type
• Box style/construction type
• Print details: colours, process, panels, special elements, reference proof
• Quantity, minimum order quantity, and packing/delivery format
• Approved sample reference (date and signed-off sample, if one exists)

Once you have this filled in for a product, keep it on file and reference it on every reorder rather than re-briefing verbally each time. If you're setting this up for the first time, our team can walk you through filling one in correctly for your specific product — reach out to Boxwaale and we'll help build it with you rather than leaving you to guess at terminology.

A written specification also protects both sides commercially. If a dispute ever arises over whether a delivered batch met the agreed quality, a signed specification sheet with defined tolerances is a far stronger reference point than trying to reconstruct what was verbally agreed months earlier.

How Boxwaale Helps

Boxwaale prepares a written specification sheet for every custom order and keeps it on file for reorders, so repeat production stays consistent instead of drifting over time. We also help first-time buyers translate a rough product brief into proper technical fields — dimensions, board grade, flute and tolerances — so nothing gets lost between what you meant and what gets manufactured.

Frequently Asked Questions